Check Cache Bugs (CC#40524)

Audit your Claude Code setup for cache and cost bugs discovered in March-April 2026.

Time: ~30 seconds | Scope: version, config files, CLAUDE.md, skills, hooks, shell profiles, all claude binaries

Note on cache contamination: This skill loads content containing cch= strings into the current session's message array. For cleanest results, run this command at the very start of a fresh session, or via claude -p "$(cat .claude/commands/check-cache-bugs.md)" as a one-shot print-mode invocation.

Reference: anthropics/claude-code#40524 | Discovered by: @jmarianski + @whiletrue0x | Extended by: @ArkNill (ArkNill/claude-code-cache-analysis, April 2026)

Background

Fix Status (current as of v2.1.92)